File oops_lib/Xoops/Core/Text/Sanitizer/Extensions/Clickable.php

  1: <?php
  2: /*
  3:  You may not change or alter any portion of this comment or credits
  4:  of supporting developers from this source code or any supporting source code
  5:  which is considered copyrighted (c) material of the original comment or credit authors.
  6: 
  7:  This program is distributed in the hope that it will be useful,
  8:  but WITHOUT ANY WARRANTY; without even the implied warranty of
  9:  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 10: */
 11: 
 12: namespace Xoops\Core\Text\Sanitizer\Extensions;
 13: 
 14: use Xoops\Core\Text\Sanitizer;
 15: use Xoops\Core\Text\Sanitizer\FilterAbstract;
 16: 
 17: /**
 18:  * TextSanitizer filter - clean up HTML text
 19:  *
 20:  * @category  Sanitizer
 21:  * @package   Xoops\Core\Text
 22:  * @author    Taiwen Jiang <phppp@users.sourceforge.net>
 23:  * @copyright 2000-2015 XOOPS Project (http://xoops.org)
 24:  * @license   GNU GPL 2 (http://www.gnu.org/licenses/gpl-2.0.html)
 25:  * @link      http://xoops.org
 26:  */
 27: class Clickable extends FilterAbstract
 28: {
 29:     /**
 30:      * @var array default configuration values
 31:      */
 32:     protected static $defaultConfiguration = [
 33:         'enabled' => true,
 34:         'truncate_length' => 60,
 35:     ];
 36: 
 37:     /**
 38:      * Make and URL's in the text clickable links
 39:      *
 40:      * @param string $text text string to filter
 41:      *
 42:      * @return mixed
 43:      */
 44:     public function applyFilter($text)
 45:     {
 46:         if (!$this->config['enabled']) {
 47:             return $text;
 48:         }
 49: 
 50:         $valid_chars = "a-z0-9\/\-_+=.~!%@?#&;:$\|";
 51:         $end_chars   = "a-z0-9\/\-_+=~!%@?#&;:$\|";
 52: 
 53:         $pattern     = "/(^|[^]_a-z0-9-=\"'\/])([a-z]+?):\/\/([{$valid_chars}]+[{$end_chars}])/i";
 54:         $text = preg_replace_callback(
 55:             $pattern,
 56:             function ($match) {
 57:                 return $match[1] . "<a href=\"$match[2]://$match[3]\" title=\"$match[2]://$match[3]\""
 58:                 . "rel=\"external\">$match[2]://".$this->truncate($match[3]).'</a>';
 59:             },
 60:             $text
 61:         );
 62: 
 63:         $pattern     = "/(^|[^]_a-z0-9-=\"'\/:\.])www\.((([a-zA-Z0-9\-]*\.){1,}){1}([a-zA-Z]{2,6}){1})((\/([a-zA-Z0-9\-\._\?\,\'\/\\+&%\$#\=~])*)*)/i";
 64:         $text = preg_replace_callback(
 65:             $pattern,
 66:             function ($match) {
 67:                 return $match[1] ."<a href=\"http://www.$match[2]$match[6]\" "
 68:                 . "title=\"www.$match[2]$match[6]\" rel=\"external\">" .
 69:                 $this->truncate('www.'.$match[2].$match[6]) .'</a>';
 70:             },
 71:             $text
 72:         );
 73: 
 74:         $pattern     = "/(^|[^]_a-z0-9-=\"'\/])ftp\.([a-z0-9\-]+)\.([{$valid_chars}]+[{$end_chars}])/i";
 75:         $text = preg_replace_callback(
 76:             $pattern,
 77:             function ($match) {
 78:                 return $match[1]."<a href=\"ftp://ftp.$match[2].$match[3]\" "
 79:                 . "title=\"ftp.$match[2].$match[3]\" rel=\"external\">"
 80:                 . $this->truncate('ftp.'.$match[2].$match[3]) .'</a>';
 81:             },
 82:             $text
 83:         );
 84: 
 85:         $pattern     = "/(^|[^]_a-z0-9-=\"'\/:\.])([-_a-z0-9\'+*$^&%=~!?{}]++(?:\.[-_a-z0-9\'+*$^&%=~!?{}]+)*+)@((?:(?![-.])[-a-z0-9.]+(?<![-.])\.[a-z]{2,6}|\d{1,3}(?:\.\d{1,3}){3})(?::\d++)?)/i";
 86:         $text = preg_replace_callback(
 87:             $pattern,
 88:             function ($match) {
 89:                 return $match[1]. "<a href=\"mailto:$match[2]@$match[3]\" title=\"$match[2]@$match[3]\">"
 90:                 . $this->truncate($match[2] . "@" . $match[3]) . '</a>';
 91:             },
 92:             $text
 93:         );
 94: 
 95: 
 96:         return $text;
 97:     }
 98: 
 99:     /**
100:      * truncate string in context of
101:      *
102:      * @param string $text string to be truncated
103:      *
104:      * @return string
105:      */
106:     protected function truncate($text)
107:     {
108:         $config = $this->config;
109:         if (empty($text) || empty($config['truncate_length']) || mb_strlen($text) < $config['truncate_length']) {
110:             return $text;
111:         }
112:         $len = (((mb_strlen($text) - $config['truncate_length']) - 5) / 2);
113:         if ($len < 5) {
114:             $ret = mb_substr($text, 0, $len) . ' ... ' . mb_substr($text, -$len);
115:         } else {
116:             $ret = mb_substr($text, 0, $config['truncate_length']);
117:         }
118:         return $ret;
119:     }
120: }
121:
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